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Great job on this calculator - thank you ! 
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Thanks...Great job on this calculator - thank you !![]()
I agree with that critique. I am using pre-built sliders but may change it to my own when i have time...Yea it really is a great calculator. The only critique I might offer is the screen size could use arrows on the screen size slider to make it easier to set to the exact screen size. Kinda hard to just slide it with the mouse and get it just right. Almost impossible on a mobile device.
I am not sure about LOW LASER Mode, the 1200 was an estimate based on 1600 being HIGH mode at mid-zoom. I am pretty sure about 1500-1600 in HIGH though.Hi Coderguy,
I'm selecting home projector and I'm using webprojectorcalculator to determine which one is the better choice for me.
When I choose Sony VW885ES on 161 inc diagonal 1.3 Gain and 6.1m throw distance it looks very good based on Webprojectorcalculator. ( 21.4 FL with 1200 Lumens calibrated Low) but
on projector central Pro calculator the results are very different and poor brightness (14 FL does not show output lumens).
So my question is what source can I trust? The question is really important for me, will appreciate for your comments)
Your projector calculator is great! The main addition I'd like to see is the horizontal lens shift slider. I've been referring other people that are looking at projectors to your site to compare different models. Thanks for all the effort you've put into this site.Features Planned Farther into the Future
Horizontal Lens Shift
I will be adding a Horizontal Lens Shift Slider that will automatically restrict your Vertical Shift in accordance to how much H-shift you use. Hence, I am going to keep this simple to use, so it will be a slider under the V-shift, you will just slide how many inches to the left or right of center.
What you are missing is that the calculator is calculating it for simultaneous use of 16:9 on the CIH screen using lens memory, rather than just calculating it for ONLY 2.35-2.40 use on the CIH screen. So the lens shift becomes limited by the constraints of how the 16:9 image relates to the CIH screen, not just the CIH image by itself. You are correct if you always use 2.39 mode and never switch back to 16:9, but in your example, the amount of lens shift fails with lens memory, because lens memory is more restrictive.@coderguy
However, when you go with a 120" 2.39:1 screen - 120" x 50" the calculator says you can only shift the image 47" from the center of the screen (50" x .94).
The calculator is great, I hope you can get this fixed in the next revision!
What you are missing is that the calculator is calculating it for simultaneous use of 16:9 on the CIH screen using lens memory, rather than just calculating it for ONLY 2.35-2.40 use on the CIH screen. So the lens shift becomes limited by the constraints of how the 16:9 image relates to the CIH screen, not just the CIH image by itself. You are correct if you always use 2.39 mode and never switch back to 16:9, but in your example, the amount of lens shift fails with lens memory, because lens memory is more restrictive.
That is why the calculator calls it 2.35 (Lens Memory) rather than just 2.35, since lens memory means the ability to go back and forth between 16:9 and 2.35.
Since most people using the calculator would not understand all these details, I decided to remove the option of ONLY using 2.35 (non lens memory), because so few people are watching stuff only using 2.35 aspects, many people will end up shrinking back down to 16:9 for other movies.
Therefore, it's not incorrect, and also this has been checked by multiple engineers and dealers over time (not just me).
When you cut it close, you have to take the measurements yourself, the calculator gives you a good general idea.Hi,
Been using your web calculator to install my Optoma UHD50 on a 106 inches 16:9 screen . The calculator indicate that i need a 4 inch mounting pole and that the top of the screen should be 7 inches from the Ceiling and 2,7 feet from the floor with a lens offset of 0.1 inch.
I am using a perless PRG-UNV mount on the projector. Do i need to factor in the height of the peerless mount to find the proper mounting pole lenght in order to achieve 4 inches from the ceiling ?? Because if so i would have to attach the peerless directly to the ceiling so the projector fall 4 inches from ceiling otherwise the projected image is too low and i cannot get it to display 7 inches from top
Am i calculating this the right way
Alain
When you cut it close, you have to take the measurements yourself, the calculator gives you a good general idea.
I would find out the thickness of the base plate of the mount and double check the Optoma manual to be safe.
You can test it out by placing the PJ on a ladder or tall shelf (very very carefully) before actually mounting it.
I have a question about screen gain...I assume we plug in tested gain not advertised? I have a Da-lite HP screen that I don't know the gain (either 2.4 or 2.8.....Thanks, I will continue to improve it at the beginning of next year.